[libreoffice-users] [Calc] Data sorting

Hallo everyone.
Let say I have a list of my customers. Each raw consist of his/her name 
and the postal address (separate columns). The address is a mixture of 
letters and numbers. Now I would like to sort this list according to 
customers lactation.

As the result I get something like this (1):

TheSameStreetName 12/1
TheSameStreetName 15/1
TheSameStreetName 19A m21
TheSameStreetName 25A/2
TheSameStreetName 7/3

But I would rather expect to get this kind of list (2):

TheSameStreetName 7/3
TheSameStreetName 12/1
TheSameStreetName 15/1
TheSameStreetName 19A m21
TheSameStreetName 25A/2

Do I make something wrong? Why the list is sorted in that way (odd to me 
:-)? Is it possible to get the result according to list number 2? Thanks 
in advance for all your help.
Regards,

gordom

--
For unsubscribe instructions e-mail to: users+help@global.libreoffice.org
Problems? http://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/
Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette
List archive: http://listarchives.libreoffice.org/global/users/
All messages sent to this list will be publicly archived and cannot be deleted